2021 Sour Bicycles Crumble Base

	S 27,5''	M 29''	L 29''	XL 29''
Stack	630mm	635mm	640mm	645mm
Reach	440mm	451mm	467mm	482mm
Stack to Reach Ratio	1.43:1	1.41:1	1.37:1	1.34:1
Seat Tube Length, Unknown	370mm	410mm	450mm	510mm
Top Tube Length, Effective/Horizontal Unknown	590mm	610mm	630mm	650mm
Top Tube Slope	27deg	23.2deg	19.4deg	13.9deg
Head Tube Angle	66deg	66deg	66deg	66deg
Seat Tube Angle	75.5deg	75deg	75deg	75deg
Head Tube Length	95mm	100mm	105mm	110mm
Bottom Bracket Drop	48mm	65mm	65mm	65mm
Bottom Bracket Height	307.5mm	309.5mm	309.5mm	309.5mm
Chainstay Length	415mm	425mm	425mm	425mm
Chainstay Length Horizontal	412.2mm	420mm	420mm	420mm
Front-Center	750.3mm	765.8mm	783.7mm	800.6mm
Front-Center Horizontal	748.8mm	763mm	781mm	798mm
Wheelbase	1161mm	1183mm	1201mm	1218mm
Fork Offset/Rake	51mm	51mm	51mm	51mm
Fork Length, Unknown	515mm	531mm	531mm	531mm
Trail	102.5mm very high	110.9mm very high	110.9mm very high	110.9mm very high
Mechanical Trail	93.6mm	101.3mm	101.3mm	101.3mm
Wheel Flop	38.1mm	41.2mm	41.2mm	41.2mm
Tire to Pedal Spindle	224.8mm 170 mm cranks	221.3mm 170 mm cranks	239.2mm 170 mm cranks	256.1mm 170 mm cranks
Pedal Spindle to Ground Clearance	137.5mm 170 mm cranks	139.5mm 170 mm cranks	139.5mm 170 mm cranks	139.5mm 170 mm cranks

Very Upright

Somewhat Upright

Average

Somewhat Aggressive

Very Aggressive

The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.

Category Trend

Source:https://sour.bike/candy-shop/bikes/crumble/

Geometry